* Make clear that memory types for imported host memory must be host visible in slink:VkMemoryHostPointerPropertiesEXT.txt (public issue 897). * Make <<interfaces-resources-layout, WARNING block>> into a NOTE block, per the styleguide (public pull request 916).

Internal Issues:

* Make <<textures-output-format-conversion, computation of derivatives in non-uniform flow control>> have undefined behavior (internal issue 1367). * Make behavior, not just values, undefined for <<textures-layout-validation, reads from inconsistent YCbCr layouts>> (internal issue 1366). * Consolidate version and extension behavior documentation in the <<extended-functionality, Extended Functionality>> appendix, While a great deal of text was moved from other parts of the Specification into the appendix, this just serves to simplify and make consistent discussions of versions and extensions (internal issue 1473). * Add limits for slink:VkPhysicalDeviceRayTracingPropertiesNV in the <<features-limits-types, Required Limit Types>> and <<features-limits-required, Required Limits>> tables (internal issue 1511). * Disallow <<memory-protected-memory, indirect calls within protected command buffers>> by adding valid usage statements for the related indirect dispatch and draw commands (internal issue 1513). * Add valid usage stataements to slink:VkGraphicsPipelineCreateInfo, slink:VkSubpassDescription, slink:VkSubpassDescription2KHR, slink:VkSubpassDescriptionDepthStencilResolveKHR, and slink:VkImageViewCreateInfo preventing the creation of a renderpass with attachments in formats that are not supported for rendering (internal issue 1552). * Qualify valid usage statements for slink:VkAttachmentReference::pname:layout parameter so restrictions only apply if an attachment is ename:VK_ATTACHMENT_UNUSED (internal issue 1561). * Add valid usage statement for flink:vkCmdDrawIndirectByteCountEXT restricting pname:vertexStride to be positive (internal issue 1566). * Make the `VK_EXT_sample_locations` extension depend on `VK_KHR_get_physical_device_properties2` in `vk.xml`. * Rearrange and simplify the <<interfaces-resources-layout, block layout rules>>.

Fixed Issues- Using the Alt+Tab shortcut out of a fullscreen application or game may be slow or take longer than expected when using a display connected by DisplayPort.- Apply and Discard buttons may not appear in some areas of Radeon Overlay under the Radeon WattMan overclocking tab.- Radeon WattMan may fail to apply memory clock changes on AMD Radeon VII.- AMD Radeon VII may intermittently experience a system hang when attempting to perform a timeout detection and recovery on Windows®7 system configurations.- Radeon WattMan may display the incorrect max fan/temperature values for AMD Radeon VII.- Radeon WattMan may experience issues with changed values failing to save or load when multiple changes are applied at once.- AMD Radeon VII may experience intermittent system stability issues on some X399 motherboards.- Player Unknown’s Battlegrounds may intermittently experience an application crash when changing post-processing settings.- Radeon Settings may experience an application hang when loading the performance histogram in a game profile through game manager.- Update Notifications may sometimes incorrectly list the currently installed driver as an available upgrade.- Apex Legends™ may intermittently experience line corruption on AMD Radeon VII.